Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/opensubdiv-source/opensubdiv/osd/mtlPatchTable.h

@@ -0,0 +1,80 @@
+//
+//   Copyright 2013 Pixar
+//
+//   Licensed under the terms set forth in the LICENSE.txt file available at
+//   https://opensubdiv.org/license.
+//
+
+#ifndef OPENSUBDIV3_OSD_MTL_PATCH_TABLE_H
+#define OPENSUBDIV3_OSD_MTL_PATCH_TABLE_H
+
+#include "../version.h"
+#include "../far/patchDescriptor.h"
+#include "../osd/nonCopyable.h"
+#include "../osd/types.h"
+#include "../osd/mtlCommon.h"
+
+@protocol MTLDevice;
+@protocol MTLBuffer;
+
+namespace OpenSubdiv {
+namespace OPENSUBDIV_VERSION {
+
+namespace Far {
+    class PatchTable;
+};
+
+namespace Osd {
+
+class MTLPatchTable : private NonCopyable<MTLPatchTable> {
+public:
+    using VertexBufferBinding = id<MTLBuffer>;  // buffer binding type
+
+    MTLPatchTable();
+    ~MTLPatchTable();
+
+    template<typename DEVICE_CONTEXT>
+    static MTLPatchTable *Create(Far::PatchTable const *farPatchTable, DEVICE_CONTEXT context)
+    {
+        return Create(farPatchTable, context);
+    }
+
+    static MTLPatchTable *Create(Far::PatchTable const *farPatchTable, MTLContext* context);
+
+    PatchArrayVector const &GetPatchArrays() const { return _patchArrays; }
+    id<MTLBuffer> GetPatchIndexBuffer() const { return _indexBuffer; }
+    id<MTLBuffer> GetPatchParamBuffer() const { return _patchParamBuffer; }
+
+    PatchArrayVector const &GetVaryingPatchArrays() const { return _varyingPatchArrays; }
+    id<MTLBuffer> GetVaryingPatchIndexBuffer() const { return _varyingPatchIndexBuffer; }
+
+    int GetNumFVarChannels() const { return (int)_fvarPatchArrays.size(); }
+    PatchArrayVector const &GetFVarPatchArrays(int fvarChannel = 0) const { return _fvarPatchArrays[fvarChannel]; }
+    id<MTLBuffer> GetFVarPatchIndexBuffer(int fvarChannel = 0) const { return _fvarIndexBuffers[fvarChannel]; }
+    id<MTLBuffer> GetFVarPatchParamBuffer(int fvarChannel = 0) const { return _fvarParamBuffers[fvarChannel]; }
+
+protected:
+    bool allocate(Far::PatchTable const *farPatchTable, MTLContext* context);
+
+    PatchArrayVector _patchArrays;
+
+    id<MTLBuffer> _indexBuffer;
+    id<MTLBuffer> _patchParamBuffer;
+
+    PatchArrayVector _varyingPatchArrays;
+
+    id<MTLBuffer> _varyingPatchIndexBuffer;
+
+    std::vector<PatchArrayVector> _fvarPatchArrays;
+    std::vector<id<MTLBuffer>> _fvarIndexBuffers;
+    std::vector<id<MTLBuffer>> _fvarParamBuffers;
+};
+
+} // end namespace Osd
+
+} //end namespace OPENSUBDIV_VERSION
+using namespace OPENSUBDIV_VERSION;
+
+} //end namespace OpenSubdiv
+
+#endif //end OPENSUBDIV3_OSD_MTL_PATCH_TABLE_H